Seems Wilkinson is saying the route from The Sea Wall to WHF had very good terrain - 'there is a well constructed private tarmacked road/farm track which eventually leads to The Sea Wall via WHF & Wyke Farm'.
My estimation was the farm track was as wide as a car. As Rob said, tractors need to go down farm tracks. So wide with very good terrain.
Pages Lane is designed for cars so perfect terrain for a bike.